Python 100例-47 Python 100例-46 Python 100例-48 实例47 题目: 两个变量值互换。 程序分析: 无 程序源代码: #!/usr/bin/python # -*- coding: UTF-8 -*- def exchange(a,b): a,b = b,a return (a,b) if __name__ == '__main__': x = 10 y = 20 print 'x = %d,y = %d' % (x,y) x,y = exchange(x,y) print 'x = %d,y = %d' % (x,y) 以上实例输出结果为: x = 10,y = 20 x = 20,y = 10 Python 100例-46 Python 100例-48